package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Map> mapList = new ArrayList<>();
        List<Double> turnoverList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("status", Orders.COMPLETED);
            map.put("begin", beginTime);
            map.put("end", endTime);
            mapList.add(map);
        }

        List<Map> turnoverListMap = orderMapper.sumByMapList(mapList);

        Map<LocalDate, Double> turnoverMap = new HashMap<>();
        for (Map data : turnoverListMap) {
            /* 手动将 java.sql.Date 类型转换为 LocalDate 类型，BigDecimal 类型转换为 double 类型

            LocalDate date = ((java.sql.Date) data.get("date")).toLocalDate();
            BigDecimal value = (BigDecimal) data.get("turnover");
            // 使用 BigDecimal 的 doubleValue() 方法将其转换为 double 类型
            Double turnover = value.doubleValue();
            turnoverMap.put(date, turnover != null ? turnover : 0.0);
            */
            LocalDate date = (LocalDate) data.get("date");
            Double turnover = (Double) data.get("turnover");
            turnoverMap.put(date, turnover != null ? turnover : 0.0);
        }

        for (LocalDate localDate : dateList) {
            turnoverList.add(turnoverMap.getOrDefault(localDate, 0.0));
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();


    }

     /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Integer newUser = userMapper.getUserCount(beginTime, endTime);
            Integer totalUser = userMapper.getUserCount(null, endTime);
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO orderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> completeCountList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);

            Integer orderCount = orderMapper.getOrderCount(null, beginTime, endTime);
            Integer completeCount = orderMapper.getOrderCount(Orders.COMPLETED, beginTime, endTime);
            orderCountList.add(orderCount);
            completeCountList.add(completeCount);
        }

        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = completeCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(orderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCountList(StringUtils.join(completeCountList, ","))
                .validOrderCount(validOrderCount)
                .build();

    }

    /**
     * 销量排名前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);

        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出数据
     * @param response
     * @throws Exception
     */
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        // 查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN),
                LocalDateTime.of(end, LocalTime.MAX));


        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        XSSFWorkbook workbook = null;
        try {
            workbook = new XSSFWorkbook(inputStream);

            // 设置单元格样式
            XSSFCellStyle cellStyle = workbook.createCellStyle();
            cellStyle.setAlignment(HorizontalAlignment.CENTER);  // 水平居中
            cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);  // 垂直居中

            XSSFSheet sheet = workbook.getSheetAt(0);
            XSSFCell cell = sheet.getRow(1).getCell(1);
            cell.setCellValue(begin + "至" + end);
            cell.setCellStyle(cellStyle); // 设置单元格值并应用样式

            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());

            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                // 准备数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN),
                        LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());

            }

            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            workbook.write(out);
            // 关闭资源
            out.close();
            workbook.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }
}
